Corrugating machine



"v [23,916 Aprli 5, 1927 c. A. FRCK CORRUGAT ING MACHI NE Filed May 1, 1925 2 Sheets-Sheet 1 IN VEN TOR.

Cheat erfl. Prick/ ATTORNEYJ April 5,1927.

C. A. FRlCK v CORRUGATING MACHINE Fil ed May 1, 1925 2 Sheets-Sheet 2 INVENTQR.

5/765 Zel'fl F 21 0k,

A TTORNEY5 I Patented Apr. 5, 1927.

UNITED STATES PATENT OFFICE CHESTER a. rnrox, or MU'NCIE, INDIANA, AssIeNoR-ro" eLnscoo Baornnns MANU- FAGTUEING COMPANY, on MUNCIE, INDIANA, a'conronnfr'ron or INDIANA.

CORRUGATING MAeHrn-n.

Application filed May ,1, 1925. Serial 110. 23153.

-My invention relates to improvements in sheet metal bendingmachines and particularlyto machines for forming corrugations or ridges in sheet metal. I

My -machine is adapted for forming a series of substantiallysemi-cylindrical indentations or ridges, in the sheet metal, eX- tending fromone edge to the other thereof, these semi-cylindrical indentations being spaced apart by comparatively narrow peaks or ridges.

For the purpose of disclosing my invention I have illustrated one embodiment thereof in the accompanying drawings in which Fig. 1 is a side elevation partly in section of a machine embodying my invention;

Fig. 2 is an end elevation thereof; 7

Fig. 3 is a bastard transverse section of a machine illustrated in Figs. 1 and 2.

Fig. 4; is a perspective view showing the center clamping member, and

Fig. 5 is a detail sectional view showing the action of the persuader bars.

In the embodiment of the invention illustrated I provide a suitable base member 1 which may be a solid casting and is mounted in any suitable manner as on risers 2,. The top face of this base member is provided with a plurality of semi-cylindrical dies 3 which extend the entire length of the bed or base 1 and are suitably spaced apart at 4. (lo-operating with the dies 3 are a plurality of reciprocating dies 5 which are adapted to be vertically moved. toward the dies '3 and have their faces provided with quatra cylindrical recesses .6 adapted to coincide with the .dies 3. There is provided a pair of the :dies 5 for each of the dies 3 and with the exception .of the end dies the .quatra cylindrical recesses 6 co-operate to form a projection adapted to extendinto the space 4 between the dies 3. Each pair of dies 5 are separated on a line extending through the center of a die 3. At each end, each of the dies5 is provided with a riser 7 carrying on its face a roller 8 which roller co-operates with a cam bar 9 adapted to be projected transversely .of the die bars and engage beneath the rollers for the purpose f ra sing 'thc die b rs 5 an-dholding the are clear of the dies 3. This cam bar 9 slides on ashoulder 10 extending from a cross bar 11, one of which is provided at each end of the bed and mounted above the dies5 and 8 being supported on one side by suitable spacer members 12 mounted on the side face fthe' bed 1 and ,on the 0pposite side by suitable supports or spacer members l3- likewise secured to a side face of the bed, Each of the cam bars 9 on its under face is provided with a series of rack teeth It adapted to mesh in gears 15 mounted at opposite ends of a rotatable shaft 16. One end Ofthis shaft is provided with a driving gear 17 meshing with a driving pinion l8- operated bya suitable crank 19. Byrot tingthe e a- 1k 1. i n d ction the sih-aft' 16 will be rotated and through the-pinionsor gears 15 project the cam bars '9 beneath-the rollers 8 to successively raise the diebars 5 clear of the dies 3to permit the insertion beneath the die bars 5 of the sheet to be corrugated. The .die bars 5 are drawn down on She sheet to be corrugated by persuader bars which comprise a pair of spaced apart fulcrum bars-2O having hooked upper ends 21 adapted to engage over an end of a die bar 5 and set in a suitable recess formed transversely of the end of the die bar. The lower ends of the fulcrum bars have pivotallymounted between the same on the pivot 22 a lever 23 eccentrieally mounted on the pin 22 and having a cam edge 24 adapted to engage the under face of the bed l behingd suitable lips 25. After the hooked ends 21' of the fulcrum bars 20 have engaged over the topof a .die bar and with the free end of the 'lever 23 in a raised position and the cam end engagin behind the lip 25, it is obvious that by drawing down on the lever the die bars at their ends will be forced downwardly upon the dies ,3 thereby imparting the desired shape to the metal.

As the die bars 5 are comparatively long and there is .atendency for these bars to bow .atthe center, in order therefore to insure accurate bending of the material throughout its entire length, I provide means for cramping the die bars 5 down at their centers. To this end I provide three spaced apart pressure bars 26, 27 and 28 which are bridged across the top of the die bars 5 being supported upon and secured to side members 29 secured to the side face of the bed 1. These bars are notched as at 30 on their under face and are spaced apart from the tops of the die bars 5. Go-operating with these bars is a pair of persuader bars 31 having cam portions 32 at their lower end and transversely extending pins 3 which are adapted to engage in the notches 30. Nith the bars in their raised position suitable spacer blocks 34L are inserted beneath the same on top of the die bar to be pinched down and by lowering the free end of the persuader bar 31 the cam end 32 engaging the spacer block 84 will cramp or pinch the center of the die bar into position.

In operation the cam bars 9 are run under the rollers 8 of the Various die bars until the die bars are all elevated a sufiicient distance above the dies 3 to permit the insertion of the sheet to be corrugated. After the sheet is inserted the two ends of the first die bar 5 (to the left looking at Fig. 2) are forced downwardly by means of the persuader bars and held in locked position. The center portion is likewise cramped down by one of the persuader bars 31. With the persuader bars in locked position on the first die bar the next succeeding die bar is likewise forced down into position after which the persuader bars on the first die bar may be removed and applied to the third die bar, thus successively moving a die bar downwardly and maintaining the next adjacent die bar in locked position so that the metal of the sheet to be corrugated will be taken up from a free end.

I claim as my invention:

1. In a sheet metal corrugating machine the combination with a plurality of spaced apart elongated dies substantially semicylindrical in cross section, of a plurality of co-operating dies having their faces re cessed to form recesses corresponding to said first mentioned dies and means for moving co-operating sets of dies forming a single corrugation successively to form the corrugations in the metal and holding each corrugating set of dies clamped upon the metal until the next suceeding set is being moved to form a corrugation.

2. In a sheet metal corrugating machine the combination with a plurality of spaced apart elongated dies substantially semi-cylindrical in cross section, elongated co-operating dies having recesses corresponding in shape to the cross sectional shape of said first mentioned dies, said recesses forming projections adapted to engage between said first mentioned dies, means for moving said dies toward one another to form the corrugations and for clamping each set of corrugating dies upon the metal until the next adjacent set is being operated to form a corrugation.

In a sheet metal corrugating machine the combination with a plurality of die bars substantially semi-cylindrical in cross section and spaced apart from one another, a plurality of die bars adapted to co-operate with said first mentioned dies, said die bars being formed in pairs having recesses on their faces, the recesses of a pair of dies forming a recess corresponding in cross sectional area to said first mentioned die bars and means for independently and successively moving said secondmentioned die bars toward the first mentioned die bars and holding each of the second mentioned die bars in the position to which it has been moved until the next succeeding bar has been moved to forming position.

I. In a sheet metal corrugating machine the combination with a plurality of die bars substantially semi-cylindrical in cross section and spaced apart, a plurality of cooperating movable die bars each of which has a projecting portion for projection between the first mentioned die bars, the side faces of said projecting portion being curved to correspond to the curvature of the first mentioned die bars and means for individually projecting the second mentioned die bars toward the first mentioned die bars to form the corrugations, and for clamping each set of die bars in position during the projection of the adjacent set of die bars.

5. In a sheet metal corrugating machine the combination with a plurality of stationary die bars spaced apart and substantially cylindrical in cross section, of a plurality of movable die bars arranged adjacent one another each having a projection arranged to be projected between said stationary die bars, the side walls of said projection having a curvature corresponding to the curvature of said stationary die bars, means engaging the opposite ends of said movable die bars for projecting them individually toward the stationary die bars and means engaging said movable die bars intermediate of the ends for forcing them toward the stationary die bars.

6. In a machine for corrugating sheet metal the combination with a plurality of die bars substantially semi-cylindrical in cross section, of a plurality of reciprocable die bars having projections arranged to enter the space between said stationary die bars, the side faces of the projection having a curvature corresponding to the curvature of said stationary die bars, means for simultaneously engaging the opposite ends of each of the die bars for'elevating the same to separate the same from the stationary die bars, and means engaging the ends of the movable die bars for independently projecting said die bars into engagement with the stationary die bars.

7. In a sheet metal corrugating machine,

5 the combination With a plurality of stationary corrugating dies, of a plurality of relatively movable eorrugating dies arranged to co-operate therewith each movable independently of the other and means for successively moving each of the movable dies into eo-operative relation with the stationary dies and for holding each movable die in said relation until the next succeeding die has been moved to co-operative relation with its stationary die.

CHESTER A. FRICK. 

